I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
descent decent descend duecento docent dissent desand designed disendow disunity teosinte dizened dozened
scent ascent nascent reascent descent quiescent cent sent seicento dissent descend nauseant missent ascend recent reascend cento duecento sente docent scend senti lucent lisente centu assent nocent resent decent nescient licente wisent